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  • Title: Diagnostic value of bent-lever planes in detecting abnormality of the malleus-incus complex.
    Author: Quan Y, Wu L, Li J, Xu Z, Gong R.
    Journal: Otolaryngol Head Neck Surg; 2011 Oct; 145(4):654-9. PubMed ID: 21636844.
    Abstract:
    OBJECTIVE: To retrospectively investigate the diagnostic value of the bent-lever planes in detecting abnormality of the malleus-incus complex. STUDY DESIGN: Diagnostic test assessment. SETTING: The study was conducted at the Shandong Medical Imaging Research Institute, Shandong University, Jinan, People's Republic of China. SUBJECTS: Eighty-five ears in 74 patients with surgically proved abnormality of the malleus-incus complex. MATERIALS AND METHODS: The bent-lever planes and direct axial images were reviewed by 2 radiologists. The radiologists assigned a value of abnormality or continuity to different parts of the malleus-incus complex. Differences in categorical data were evaluated with the McNemar test. The sensitivity, specificity, Youden index, and interobserver agreement were calculated. RESULTS: There was no significant difference between bent-lever planes and direct axial images in identifying abnormality of the malleus-incus complex. The sensitivity ranged from 71.4% to 97.1%, and specificity ranged from 89.5% to 100.0%. The Youden index ranged from 0.609 to 0.971. The radiologists had almost perfect or substantial agreement in identifying the abnormality of different parts of the malleus-incus complex. CONCLUSION: The bent-lever planes do not add additional diagnostic value for experienced observers.
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